37signals are well known for their suite of productivity and collaboration web apps, designed to help people work efficiently and get things done. Although 37signals applications are designed primarily for use in the browser, a wide range of complimentary Mac and iPhone software has arisen in recent years.

This post will be offering a quick overview of each 37signals app: Basecamp, Backpack, Campfire and Highrise, before moving on to outline over 25 Mac and iPhone apps designed to work alongside them. You’ll be spoiled for choice!